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Cell functions - Reproduction & genetics - Mitosis & cytokinesis - Animal cell - Mitosis & Cytokinesis - Animal Cell: (Xenopus laevis, Amphibia)
Mitosis & Cytokinesis - Animal Cell: (Xenopus laevis, Amphibia)
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| Description |
Because heart endothelial cells of Xenopus remain well spread during cell division, the individual steps in mitosis can easily be followed. In early prophase the nucleolus is still visible. The condensation of the chromatin begins, and the chromosomes become more and more prominent. Eventually the nucleolus completely disapears. With the disintegration of the nuclear membrane, prophase is ended. The two asters become vixible and move to where they will form the spindle poles. the chromosomes organize themselves into a metaphase plate. They perform oscillatory movements, which make interactions between the kinetochores and the newly formed spindle obvious. The gap between the sister chromatids indicates that the cell will soon enter anaphase. In anaphase motion begins in the region of the kinetochores, where the spindle fibers are inserted. After separation of the chromatids daughter nuclei are formed.
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Sources
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Mitose-, Karyo- und Cytokinese bei tierischen und pflanzlichen Zellen. J. BEREITER-HAHN. H. FALK. Publ.: 1977. B&W, com. ger. or engl., 172 m, 16 min. 100 µm; PH; 30 f/min.
IWF, Göttingen: C 1257
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Abbreviations
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Order |
For further films please search the IWF media catalogue for "cell biology".
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